Question

When alcohol reacts with concentrated $H_{2}SO_{4},$ intermediate compound formed is :

• A. carbonium ion
• B. alkoxyion
• C. alkyl hydrogen sulphate
• D. none of the above

Answer 1

Answer: (A)

carbonium ion

Answer 2

Conc. $H _{2} SO _{4}$ is an excellent dehydrating agent. Upon reaction with an alcohol it forms an alkene and water molecule is given out. First step involves protonation of alcohol. Which on dehydration forms carbonium ion.